Manufacture of bottle-envelops.



No. 809,299. PATENTED JAN. 9, 1906. G. B. E. HENKE & G. A. H. SGHULTB.

MANUFACTURE OF BOTTLE ENVELOPS.

APPLICATION PILED JULY 8, 1903 UNITED STAEES PATENT OFFICE.

CHRISTIAN BERNHARDT ELIAS HENKE AND GEORG-ADOLF HEINRICH SCHULTE, OFBRElVIEN, GERMANY.

MANUFACTURE OF BOTTLE-ENVELOPS.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed July 8, 1903- Serial No. 164.735.

T0 all whom it may concern:

Be it known that we, CHRISTIAN BERN- HARDT ELIAS HENKE and Gnone AD'oLFHEINRICH SoHULTE, subjects of the German Emperor, and residents ofBremen, in the German Empire, have invented certain new and usefulImprovements Relating to the Manufacture of Bottle Envelops, of whichthe following is a specification.

The present invention relates to the manufacture of bottle and likeenvelops or casings.

Latterly the well-known straw envelops or cases for bottles and the likehave been largely replaced by cases or wrappers formed of corrugatedcardboard for the reason that such cases are not only cheaper than thosemade of straw, but also because owing to the stiffness of theircorrugations they afford bet ter protection than straw covers. Thesenewer bottle-covers are, however, defective by reason of the fact thatthey conform to the shape of the bottle or other vessel to a limitedextent only. 4

This invention relates to a method of producing bottle and the likecovers of corrugated cardboard which will exactly conform to the shapeof the vessel to be covered.

This method or process consists, essentially, in wrapping around thebottle or other vessel which it is desired to cover or around a corepresenting the same outer form a piece of corrugated cardboard and inpressing this latter until it conforms to the shape of such core, thoseportions of the cardboard which are intended to be pressed around thesmaller portions of the core being moistened by means of a moist heatuntil they assume the form and contour of the article to be packedWithout appreciable resistance. This moistening may be advantageouslyeffected by means of glue, steam, or vapor, as by this means a smallquantity of glue is conveyed to the cardboard, which causes the latterto regain upon drying rigidity, which is some- What decreased by thesteaming. Preferably an end of the cardboard is left extending beyondthe smaller extremity of the core and drawn together by means of a wireor thread. The two longitudinal edges of the formed cover may be heldtogether by means of pins or the like.

1 the accompanying drawings, Figure 1 is a diagrammatic viewillustrating in what manner the cardboard may be wound around a core bymeans of a suitable roller. Fig. 2 is an elevation of a finishedenvelop, and Fig. 3 is an edge view of the corrugated cardboard.

Similar letters refer to similar parts.

According to this invention a suitable length of corrugated cardboard aa, Figs. 1 and 3, is laid flat upon the work-table, (not shown-,) thecorrugations a being upward. After moistening or steaming by anysuitable means that portion of the cardboard which is to conform to theneck of the bottle, as above mentioned, sufficient cardboard is cut fromthe length to cover the core d (orvessel, respectively) and is shaped tosaid core or vessel either by hand alone or by a shapingroller 6 or thelike, or by the two methods combined. Fig. 1 shows the corrugatedcardboard partly rolled or shaped around the core. The shaping roller orrollers may be appropriately mounted and driven in any desired manner ormanipulated by hand. After the corrugated cardboard has been rolled orshaped around the core the end 0, extending beyond the smaller end ofthe core or the mouth of the bottle, respectively, is drawn and tiedtogether by means of a wire or thread f and the overlapping edges of thecardboard secured or united by pins 6 or in any other suitable manner,thus formin an envelop or casing having the exact configuration of thecore or the vessel to be wrapped. In this manner a large number ofenvelops or casings may be uninterruptedly formed from a continuous bandof corrugated cardboard. If desired, the'overlapping edges of theenvelops may remain unfastened or ununited.

Practice has demonstrated that sufficient glue and moisture is taken upby heated air forced through a hot-glue solution or by a jet of steamforced through such a solution to restore the rigidity of the cardboardmois tened thereby upon drying, though an attenuated hot-glue solutionmay be used.

The method of forming bottle envelops or cases from the materialdescribed is not only very simple, requiring no complex mechanism ordies, but also embodies various advantages in that the envelop may beapplied to the bottle after it has been filled at the establishmentwhere the contents of the bottle are manufactured or prepared or at abottling establishment, in that the gathering of the wrapper at the endof the neck forms a cushion over the seal of the bottle that protectsthe latter against end thrusts or shocks, in that the glue carried alongwith the steam restores to the neck portion of the wrapper the rigiditywhich has been partially-destroyed by the steaming or moisture andimparts to the neck a permanent set which cannot otherwise be obtained,so that the wrapper or envelop will fit the whole of the bottle snugly,and as but little moisture is required to impart to the cardboard therequired plasticity thle moistened neck portion dries very rapid y.

A further advantage of having the outer surface of the wrapper orenvelop substantially smooth is that labels may be readily aflixedthereto, while the resistance to pressure of the fluting in contact withthe bottle is much greater than would be the case if the smooth face ofthe wrapper were in contact with the bottle.

Having fully described our invention, what we claim, and desire tosecure by Letters Patent, is-

The method of making bottle-wrappers from fluted cardboard having aplain backing, which consists in wrapping a strip of such cardboardaround the body of a bottle or around a smooth core of like form withthe plain backing outside and the fluting lengthwise of the bottle-core,steaming that portion of the cardboard which is to form the neck of thewrapper, shaping said neck by pressure, gathering and tying the end ofthe neck and uniting the overlapping sides of the cardboard, wherebysaid board will be evenly creased all around at the neck by reason ofthe pressure on the fluted board which starts the creases betweenadjacent flutings attached to the backing and causes the creases to lieparallel to the aXis of the wrapper.

CHRISTIAN BERNHARDT ELIAS HENKE. GEORG ADOLF HEINRICH SOHUL'IE.

Witnesses HERMANN ZIMMERMANN, F. WANDSCI-INEIDER.

